Extra Credit Calculator: How Much Will It Raise My Grade?

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Extra Credit Calculator

Extra credit counts differently depending on where your teacher puts it. This calculator handles the three common cases. (1) Bonus points on total points: points are added to what you earned but not to what was possible, so new grade = (earned + bonus) ÷ possible. (2) Percentage points on the final grade, for example “+2% to your final grade”. (3) Bonus points inside one weighted category, such as 5 extra homework points when homework is 40% of the grade.

In a points-based class each bonus point is worth 100 ÷ total possible points, so 10 extra points in a 500-point course raise the grade by 2 percentage points. In a weighted category, the boost is scaled by the category weight. The result shows the grade before and after, the letter grade change, and the value of a single extra-credit point.

Worked example: 412 of 500 points is 82.4% (B−). Fifteen extra points give 427 ÷ 500 = 85.4% (B). That is a 3-point gain, 0.2 points per bonus point.

Frequently asked questions

Is extra credit added to points earned or points possible?

Normally only to points earned. If the teacher adds it to both (as a new assignment), it works like a normal assignment and helps less. In that case use the Grade Calculator instead.

Can extra credit take me over 100%?

Mathematically yes. Many teachers and learning systems cap the course grade at 100%.

How many extra credit points do I need for a B?

Bonus points needed = (target % × possible ÷ 100) − earned. For 412/500 and a target of 83%, you need 415 − 412 = 3 points.

Why does extra credit barely change my grade?

In a course with many total points, each point is worth very little, and inside a small-weight category it is diluted further. Check the “value of each bonus point” line.

Last reviewed: October 8, 2026. Calculations run in your browser; nothing you enter is sent anywhere.